// 定义模块
/*
export const firstName = "张"
export const lastName = "san"
export const age = 18
*/

const firstName = "张"
const lastName = "san"
const age = 18

export {
	// 变量 as 重命名后的变量名
	firstName as f,
	// lastName,
	age as a
}
export function sum(a, b) {
	return a + b
}


